Process of producing fast brown resists on vegetable fibers.



I To all whom it may concern STATES PATENT orFicEi.

CARI; PILZ, OF LIESING, NEAR VIENNA, AUSTRIA-HUNGARY.

, r'nocns's or i nonucme r'nsr BROWN RESISTS 0N VEGETABLE FIBERS.

Ito Drawing.

Specification of Letters Patent. Application fil ed December 7, 19111serial-no. 664,450.

Patented Oct. 15, EH2.

'Be it known that I, CARL PILZ, a subject of the Austro-HungarianEmperor, residing at Liesing, near Vienna, Austria-Hungary,

'have invented-certain new and useful Improvements in Processes ofProducing Fast; Brown Resists in Vegetable Fibers, of which thefollowing is a specification.

The'surp'rising observation has been made that easily oxidized aromaticamlns when printed on undeveloped anilinblack padding, prevent theoxidation of the anilin to 'black, and are themselves developed to fastbrown dyes. If,' for example, thecotton material is padded in the usualmanner with anilin salt, potassium 'ferrocyanid,' sodiumchlorate, 'andoso forth, dried, and printed on .with an aromatic amin, for example,m-aminophenol, the subsequent steaming in a Mather-Flatt will notproduce black at the printed places, but an olive brown, while theground appears black. I 1

' The resistive efiectoof the easily oxidized amins, aminophenols,diamins, triamins, and.

so forth, is so strong that even when printing a mixture of anilin withone of these aminophenols, and so forth-with the necessary oxidizingagents, the anilin remains unoxidized and only the brown color resultsfrom the oxidized aminophenol. I The easily oxidizabl'e amins',diamin's, triamins, 'aminophenols, diaminophenols, triamins of thebenzohseri'es and naphthalene series may be utilized. These a-mi'nsareall embraced in the: generic class of easily oxidizable "aromaticamins. Some ofjthe'se'. amins give a great va rietyf -of shades, forex-' ample m-ami'nophenol gives an olive brown,

o-aminophenol a red brown, m-phenylene 'diamin and m-toluyl'ene'diar'nin an olive and o-amidocresol a yellow brown; others how- 'bysteammg. 1 4

2. The process of producing fast brown ever give less striking shades,such as p-phenylene diamin, benzidin, and so forth give very dark shadesof brown.

It isof great importance that these brown resists may easily be reservedwith the white and colored resists used habitually for aniiin -.black.'Thus, a large number of new combinations can be obtalned by means of thenew process which could not be obtained till DOW.

my process: The material prepared in the usual manner-With anilin blackpadding and then dried, is printed .on with a print color, which apartfrom the thickening, without other resist, contains for every liter40430 g.

printing on suchmaterialan easily oxidiz- The following is given as anexampletof able aromatic' amincapable of preventing the oxidization ofthe anilin' black and .developing thepadded'and printed material.

resists on vegetable fibers which comprises padding such materiai withanilin black and printing on such material an easily oxidize ableaminophenoL-and developing thepaddedand printed material by steaming.

In testimony whereof I have affixed my signature in presence of twowitnesses.

CARL PI-LZ.

Witnesses:

' RICHARD Rnrrz, AUGUST Fueenn.

re a tas

